I bought the device with the Logitech Keyboard K400. First of all: Without keyboard, the device is difficult to use. What made me very annoyed was that the keyboard lies absolutely not adjust in German but stubbornly remained in English (@ F2, z = y etc). Only through the recession of the Tillmann in passing the app External Keyboard mentioned pro, I could solve the problem (thanks Mr. / Mrs. Tillmann). Therefore, there is only 4 stars. Otherwise, the device does everything I imagined, plays Youtube videos, Gmail etc. Even mkv movies to be played, but not TS files (absolutely not bad).